I don't understand why we had all of that discussion of the quality of DaveScot's engineering background. If a biologist were to expound on the engineering feats of von Daniken's ancient astronauts, I wouldn't be wondering if that person was really a biologist.

--------------Invoking intelligent design in science is like invoking gremlins in engineering. [after Mark Isaak.]All models are wrong, some models are useful. - George E. P. Box